Analyzing photographs:
Teaching Media Through The Web: http://www.tc.umn.edu/~rbeach/linksteachingmedia/chapter8/14.htm
Ad analysis assignment: http://english.la.psu.edu/undergraduate/freshwriting/engl015.htm#Ad%20Analysis
More Movie Trailers (these also work for humorous arguments):
Icons:
Visual Arguments and Values:
USA Today snapshots: http://www.usatoday.com/news/snapshot.htm
Drunk Driving : http://www.helpjacqui.com/images/illustrations/jacqui_poster.jpg